need help on chemistry redox titration(titrating potassium maganeate with iron II)!!!!! urgently!!?

Question

5Fe2+ 8H+ + MnO4 - = 5FE3+ + Mn2+ + 4H2O

the question is asking me determine the % of iron II and iron III in a mixture containing both, where i am given 200cm3 of a solution containing 1.3g of iron ions(Fe 2+ Fe 3+) using potassium magnanete

(here is where i get confuse) You may assume that each of the 2 ions of is present to at least 30% by mass (doesnt this contradict the question?)

also, i tried calculating it out via those normal calculas titration method but i cant go any further unless if i know the vol. of potassium maganate used to titrate the iron solution.

Can i just make it up what vol. is required to titrate the iron solution with the potassium maganate??

Answer 1

To begin with, the name of the oxidizing compound is permanganate (MnO4-).

From the balanced equation you can see that the MnO4- only reacts with the Fe(II) and not the Fe(III):

5 Fe+2 + 8 H+ + MnO4- --> 5 Fe+3 + Mn+2 + 4 H2O

To calculate how much of the Iron is +2 or +3, you need the data telling you how much (in moles) of the MnO4- was used in the titration. This could be calculated if you knew the molar concentration and volume of the MnO4- solution.

One mole of MnO4- would react with 5 moles of Fe+2. You could calculate the moles of Fe+2 that was oxidized.

Knowing the 1.3 grams of Iron was in the 200 cc of Iron solution. you could then calculate the total moles of Iron. Subtract the moles of Fe+2 to get the moles of Fe+3 in the original sample.

Answer 2

You can guess if you want. But, you would need to actually need to do the experiment. Without the experimental data you cannot proceed with the calculations to find the %'s. Guessing would give you an inacurate answer (unless you guessed right of course).

Answer 3

TWELVE. communicate slowly yet think of rapidly. (....and in no way give up thinking) 13! .. while somebody asks you a query you do no longer want to respond to, smile and ask, 'Why do you want to appreciate?' ( Evasion is a style of mendacity.....in case you do no longer want to be lied to....do no longer deceive others) FOURTEEN. remember that great love and great achievements contain great threat. ( how nicely i understand that) FIFTEEN. Say 'bless you' once you hear somebody sneeze (....in no way hurts to be variety to others) sixteen. once you lose, do no longer lose the lesson. (undesirable human beings or activities instruct you what to no longer be or do) SEVENTEEN. remember the three R's: admire for self; admire for others; and accountability for all your strikes. (the final advise in this complete checklist) EIGHTEEN. do no longer permit somewhat dispute injure an surprising friendship. ( genuine friendship is according to honesty and have confidence) NINETEEN. once you recognize you have made a mistake, take instant steps to ultimate it. (.....and take accountability for it) TWENTY. Smile while choosing up the telephone. The caller will hear it on your voice. (...smiling produces endorphrines which bolster the immune device and make you greater healthy) TWENTY- ONE. Spend a while on my own. (....you should be gentle with your self in the previous others would be gentle with you)